Square.



S. D. FRAZIER.

SQUARE. APPLICATION FILED APR. 16 I91]- WITNESSES Patented June 4, 1918,

INVENTOR fidwzwlp.Frazier ATTO R N EY saivronn n. mime, or QARRIZO srnnves, TEXAS.

4 seUARE.

S pec'ification of Letters Patent.

Patented June a; rare.

Application filed ii rniaiew. Serial No. 162,422.

To all whom it may concern: 1

Be it known that I, SAMUEUD. FRAZIER, a citizen of the UnitedStates, residing at (larriao Springs,in the county of Dimmit and State of Texas, have invented'certain new and useful Improvements in Squares, of which the following is aspcification.

This invention relates to try squares such as are used by carpenters and other mechanics, and has for its primary object to provide asquare of this kind which comprises few parts, is simple in construction, and is accurate when set for right angles and also for other angles, the construction being such that the several parts will remain true substantially as long a the square is in use, there being little friction between the parts, and so the wear being slight, the tool will remain accurate indefinitely.

lVith the above as the principal objects in view, the invention consists in the novel construction, combination, and arrangement of parts hereinafter described, pointed out in the appended claims and illustrated in the accompanying drawings, in which- Figure 1 is a face view of the square set for a right angle,

Fig. 2 is a similar view of the same with one of the blades set at an angle of 15 to the other,

Fig. 3 is an enlarged view of the jointed end of the longer blade of the square,

Fig. 41 is a cross sectional view of the connection between the two blades on the line H of Fig. 1.

In the drawings, 10 indicates the longer blade of the square and 11 the shorter blade. These two blades are as usual provided with scales on their edges and are preferably made of sheet steel, the blade 11 having a central longitudinal slot 12 extending from end to end. The scales are not shown as they form no part of the invention and their position and use may be readily understood by any one skilled in the art.

The upper end of the blade 10 has formed therethrough three perforations 13, 14:, and 15, these perforations extending in a straight line across the blade are spaced from the upper end a distance equal to onehalf the width of the blade 11 so that when the latter blade is placed. over the blade 10 at a right angle thereto the slot 12 in the blade 11 will register with the three openings 18, 14 and 15.

When the blade 11 is to be fixed to the and screwed blade 10 at a right angle thereto, as in Fig. 1, two bolts 16 having heads17' are passed upwardly through the openings 1 1 and 15, the heads 17 beingseated incountersunk The threaded ends of the bolts16 pass upwardly through portions of said openings.

the slot 12 and the blade ll is tightly se cured to the blade 10 by thumb nuts 18 threaded on the upper ends of thebolts' 16 down upon said bolts and against washers 19 bearing 011 the blade 11 and across the slot 12. These two bolts 16 fit snugly in the slot 12 and hold the blade 11 perpendicular to the blade 10, care being taken in the manufacture of the tool to make the slot 12 in the blade 11 exactly parallel to the edges of the blade and to bore the openings 13, let and 15, in a line accurately perpendicular to the edges of the blade 10. The bolts also are made to fit closely in the slot 12 in order to eliminate all loose play and to maintain the two blades accurately at right angles to each other.

On the face of the blade 10 and extending tangentially from the periphery of the opening 13 is a number of lines 20 engraved 011 the face of the blade 10 and equally spaced, such lines being drawn at predetermined angles to the edges of the blade 10, such angles being most commonly used by carpenters, stair builders and others who employ a scale. hen it is desired to set the square at other than 90, the bolts 16 are removed from the openings 14 and 15 and one of them inserted in the opening 13, and a washer 19 and nut 18 placed on the end of the bolt. The blade 11 may then be swung about the bolt 16 untilthe edge 21 of the slot 12 registers with the scale marked 20 on the blade 10 of the desired angle. By tightening the thumb nut blades will be rigidly connected together at the desired angle.

If it be desired or necessary to shorten the blade 11, the nut or nuts 18 may be loosened and the blade slipped endwise on the blade 10, the slot 12 readily permitting this move ment.

What I claim is:

1. A square comprising two blades each having parallel longitudinal edges, one of which blades is centrally slotted from end to end and the other formed with a series of holes arranged in one end thereof trans versely of the blade in a line perpendicular 19 the two to said central opening,

to the longitudinal edges thereof, bolts adapted to pass through the outermost perforations and the slot, and nuts on said bolts for rigidly connecting the blades in perpendicular relation.

2. A square comprising a blade having a series of perforations at one end arranged transversely of the blade in a line perpendicular to the longitudinal edges of the blade, one of said openings being located centrally with respect to the others, a scale being formed on one side of said blade partly surrounding said central opening, the markings of said scale being tangential a second blade having a central longitudinal slot therein, a

Copies of this patent may be obtained for five cents each, by addressing the bolt adapted to be passed through one of said perforations in the first named blade and through the slot in the second blade to permit the latter blade to swing and be adjusted at various angles to the first blade, a thumb nut for said bolt, and a second bolt with thumb nut adapted to pass through another of said perforations and the slot to lock the blades when they have been arranged perpendicular to each other.

In testimony whereof I affix my signatiu-e in presence ofitwo witnesses.

SAMUEL D. FBAZIER. WVitnesses:

A. WILDENTHAL, W. T. GARDNER.

Gommissloner of Patents,

Washington, D. G. 

